chore: Deprecate kyma-cli v2 (#2095) (#2096)

* draft

* update warning

* Apply suggestions from code review



* Update README.md



---------

Co-authored-by: Krzysztof Kwiatosz <krzysztof.kwiatosz@sap.com>
Co-authored-by: Grzegorz Karaluch <grzegorz.karaluch@sap.com>

README.md

@@ -2,6 +2,10 @@
 
 # Kyma CLI
 
+> [!WARNING]
+> The Kyma CLI version `v2`, with all commands available within this version, is deprecated. We've started designing the `v3` commands that will be first released within the `alpha` command group.
+> Read more about the decision [here](https://github.com/kyma-project/community/issues/872).
+
 ## Overview
 
 Kyma CLI is a command line tool which supports [Kyma](https://github.com/kyma-project/kyma) developers. It provides a set of commands and flags you can use to:

cmd/main.go

@@ -1,13 +1,16 @@
 package main
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/kyma-project/cli/cmd/kyma"
 	"github.com/kyma-project/cli/internal/cli"
 )
 
 func main() {
+	fmt.Print("WARNING: All commands within v2 are deprecated. We are designing v3 of kyma CLI  with a new set of commands that will be first released  within alpha command group.\n\n")
+
 	command := kyma.NewCmd(cli.NewOptions())
 
 	err := command.Execute()